1. Code Name: HINST

2. Category: VIIc. Linear Stability: 2D high-n Kinetic-MHD stability

3. Responsible Physicist:  N. Gorelenkov  and   C. Z. Cheng

4. Others involved in code development: G. Y. Fu, W. Tang

5. One line description: 2D high-n kinetic-MHD stability code for tokamaks with energetic particles by employing Ballooning in polodal and Fourier in radial directions.

6. Computer systems which code runs on: Unix based computers.

7. Typical running time: 20 minutes-1 hour/ alpha workstation time.

8. Approximate number of code lines: 6,000 lines

9. Does this code read data files from another code? Can read plasma parameters data from TFTR TRANSP analysing code and equilibrium codes.

10. Does this code produce data files that can be read by another code? If so, explain. It produces data file that can be read by test particle orbit calculation code to study plasma transport.

11. 1-2 paragraph description of code: The HINST code computes space structure and stability of high-n modes such as TAE and ballooning modes in the presence of energetic particles such as NBI and ICRF heated particles and alpha particles for high beta tokamaks with noncircular flux surfaces. The HINST code makes use of the Ballooning in polodal and Fourier in radial directions formalism to determine the global mode structure and stability. It can be used in two forms to provide the local (1D in balooning variable) and the global solutions (2D in balooning and radial variables).

12. Similar codes to this code, and distinguishing differences: In local version similar solutions can be obtained by FULL (G.Rewoldt is author) code.

13. Journal References describing code (up to 3):
C. Z. Cheng, N. Gorelenkov, C. T. Hsu, Nucl. Fusion 35, 1639 (1995)
Gorelenkov N. N., C. Z. Cheng, and W. M. Tang,  HINST: A 2-D Code for High-n TAE Stability
Phys. Plasmas, 5, 3389 (1998).

14. New code capabilities planned for next 1-2 years: To include more accurate plasma geometry with arbitrary cross-section, correct evaluation of the trapped/passing ratio calculation and finite particle banana width.

15. Code users: N. Gorelenkov, C.Z.Cheng.

16. Present and recent applications of code:
Alpha particle destabilization of TAE modes in the presence of strong drive in: (1) JT60-U experiments with NNBI, (2) TFTR ICRF driven RTAE (3) DIII-D ERS plasma alfven activity.

17. Status of code input/output documentation. Check one: ( ) does not exist ( X ) incomplete ( ) exists

18. Year Code was first used and present frequency of use: Code was first used in 1995. Presently, it is used commonly for studying high-n TAE/RTAE stability in JT60-U, DIII-D, TFTR.

19. Estimate of Man-Years invested in developing code: 2 man years.

20. Catagories of usage of Code (Check all that apply): (X) application code to do analysis and prediction of experiments (X) numerical testbed of theoretical ideas (X) physics module to be used in integrated moddelling ( ) code for machine design

21. Language code is writen in: Fortran

22. Results of intercomparisons with other codes and results of validation against experiments. HINST code will be compared with other codes such as NOVA-K. It reproduced frequency chirping modes in JT60-U, TFTR and DIII-D. Good agreement was seen in terms of frequency evoluiton and its estimate in those experiments.